Improvement in stove-pipe joints



1:. R. an'owmow.

STOVE-PIPE JOINT.-

No 172,844. Patented Feb.1, 1876.

. B c 4e NAPETERS. PHOTO-LITHUGRAPHER, WASHINGTON, D10

b UNITED STATES DAVID RQBROWNLOW, OF MIDDLETOWN, CONNECTICUT.

IMPROVEMENT m STOVE-PIPE JOINTS.

Specification forming part of Letters Patent No. 172,844, dated February1, 1876 application filed October 11, 1875.

To all whom it may concern:

Be it known that 1, DAVE) R. BROWNLOW, of Middletown, county ofMiddlesex, State of Connecticut, have invented an ImprovedCoupling-Joint for Stove-Pipe,;of which the followin g is aspecification, reference being had to the accompanying drawings formingpart hereof.

My invention consists, as a coupling-joint for stove-pipe, in thecombination, with the ends of each length of pipe, formed with thespecific curves in its exterior surface, and the circumferential flange,hereinafter particularly shown and described, of an encircling band,formed with-the specific curves on its interior surface, arranged to fitupon and into the curves and flanges upon the ends of the pipe-lengths,as herein specified.

Figure l is a longitudinal central sectional view of the ends of twolengths of stove-pipe embodying my invention, and adjusted as a joint.Fig. 2 is a side elevation of the same, showing the encircling band inposition to complete the coupling-joint.

A and A are the sections or lengths of pipe. Each length is formed withits exterior surface curved outwardly at a, beyond the line of thesurface b of the pipe, and curved or depressed inwardly at 0, below theline of the surface b, and with the projecting flanges or lips d d,which are arranged at right angles to the surface I), as shown, on eachof the lengths A and A, respectively, as shown. The said curves a and cand flanges d d are formed in each end of each length of pipe, andextend circumferentially around the pipe, as shown.

B is the encircling band, and its interior surface is formedwith thecentrally-located circumferential deep and narrow curve 6, and thecircumferential short projecting curves b, and the circumferential widedepressed curves 0. on either side of the curve e, as shown. The curve 6is arranged to fit over the flanges d and d when the ends of twosections A and A are adjusted together, as shown in Fig. 1 and the shortcurves 1; project and fit into the depressed curves 0, and. the widecurves at fit over and upon the curves at in the pipesections. The saidcurves being adjusted into and upon each other, and the band B beingdrawn closely about the pipe-joint by the screw-bolt shown at C, thesections are sesur'ely and tightly jointed andcoupled together.

The metal of which the band B is constructed being thin, the curvesformed, as described, on its interior'surface appear upon its exteriorsurface in reverse in Fig. 2.

I am aware that a pipe-coupling has been heretofore made with acorrugation formed in the end portion of each section of pipe, incombination with a band having depressions .to correspond to and fitover said specific corrugations, and also that a pipe-coupling has beenheretofore made with a flange turned up on the end of each section, incombination with aband having a recess for the reception of said flangeswhen adjusted together. I do notclaiin either of these devices, eitherseparately or together, intending to limit my claim hereunder to thespecific and particular combination of curves in the pipe-sections andencircling band herein shown and described that is to say, to thepipesections A and A,

arranged to be firmly jointed and coupled together by means of thecurves a projecting above the exterior surfaces 1), the curves 0depressed below said surface I), and the flanges d d at right angles. tosaid surface b, formed in the ends of the said pipe-sections, incombination with the encircling band B, having the centrally-locateddeep narrow curve 6, arranged to fit over the flanges d' d when adjustedtogether, the curves 1) arranged to fit into the curves 0 in the'pipe,and the curves at arranged to fit into the curvesa in the pipe, togetherwith the binding-screw C.

What I claim, therefore, as my invention,

and desire to secure by Letters Patent, is-

The combination, as a coupling-joint for stove-pipe sections, ofthesections A and A, having the circumferential outward curves a andinward curves 0, in the exterior surface thereof, extending,respectively, above and below the line of the surface b, and thecircumferential right-angled flanges d and d, respectively, with theband B, having the central deep, narrow curve e, the short projectingcurves 1), and wide curves a, extending circumferentially on theinterior surface thereof, and the binding-screw C, all constructed andarranged to operate as described.

DAVID R. BROWNLOW.

Witnesses:

A. B. OALEF, D. WARD NoarHRor.

PATENT Orrrcn.

